Module org.glavo.classfile

Package org.glavo.classfile.impl

Class BufWriterImpl

java.lang.Object

org.glavo.classfile.impl.BufWriterImpl

All Implemented Interfaces:

BufWriter

public final class BufWriterImpl
extends Object
implements BufWriter

Constructor Summary

Constructors

Constructor	Description
BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context)
BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize)
BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize, ClassEntry thisClass, int majorVersion)

Method Summary

Modifier and Type	Method	Description
ByteBuffer	asByteBuffer()	Returns a ByteBuffer view of the bytes in the buffer.
boolean	canWriteDirect(ConstantPool other)	Returns whether the provided constant pool is index-compatible with this one.
ConstantPoolBuilder	constantPool()	Returns the constant pool builder associated with this buffer.
ClassFileImpl	context()
void	copyTo(byte[] array, int bufferOffset)	Copy the contents of the buffer into a byte array.
int	getMajorVersion()
LabelContext	labelContext()
void	patchInt(int offset, int size, int value)	Patch a previously written integer value.
void	reserveSpace(int freeBytes)	Ensure that the buffer has at least freeBytes bytes of unused space
void	setLabelContext(LabelContext labelContext)
int	size()	Returns the number of bytes that have been written to the buffer.
ClassEntry	thisClass()
void	writeBytes(byte[] arr)	Write the contents of a byte array to the buffer
void	writeBytes(byte[] arr, int start, int length)	Write a range of a byte array to the buffer
void	writeBytes(BufWriter other)	Write the contents of another BufWriter to the buffer
void	writeDouble(double x)	Write a double value to the buffer
void	writeFloat(float x)	Write a float value to the buffer
void	writeIndex(PoolEntry entry)	Write the index of the specified constant pool entry, as a u2, to the buffer
void	writeIndexOrZero(PoolEntry entry)	Write the index of the specified constant pool entry, as a u2, to the buffer, or zero if the entry is null
void	writeInt(int x)	Write a signed int to the buffer
void	writeIntBytes(int intSize, long intValue)	Write a 1, 2, 4, or 8 byte integer value to the buffer.
<T extends WritableElement<?>> void	writeList(List<T> list)	Write a list of entities to the buffer.
void	writeListIndices(List<? extends PoolEntry> list)	Write a list of constant pool entry indexes to the buffer.
void	writeLong(long x)	Write a long value to the buffer
void	writeU1(int x)	Write an unsigned byte to the buffer
void	writeU2(int x)	Write an unsigned short to the buffer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BufWriterImpl

public BufWriterImpl(ConstantPoolBuilder constantPool,
 ClassFileImpl context)

BufWriterImpl

public BufWriterImpl(ConstantPoolBuilder constantPool,
 ClassFileImpl context,
 int initialSize)

BufWriterImpl

public BufWriterImpl(ConstantPoolBuilder constantPool,
 ClassFileImpl context,
 int initialSize,
 ClassEntry thisClass,
 int majorVersion)

Method Details

constantPool

public ConstantPoolBuilder constantPool()

Description copied from interface: BufWriter

Returns the constant pool builder associated with this buffer.

Specified by:

constantPool in interface BufWriter

Returns:

the constant pool builder associated with this buffer

labelContext

public LabelContext labelContext()

setLabelContext

public void setLabelContext(LabelContext labelContext)

canWriteDirect

public boolean canWriteDirect(ConstantPool other)

Description copied from interface: BufWriter

Returns whether the provided constant pool is index-compatible with this one. This may be because they are the same constant pool, or because this constant pool was copied from the other.

Specified by:

canWriteDirect in interface BufWriter

Parameters:

other - the other constant pool

Returns:

whether the provided constant pool is index-compatible with this one

thisClass

public ClassEntry thisClass()

getMajorVersion

public int getMajorVersion()

context

public ClassFileImpl context()

writeU1

public void writeU1(int x)

Description copied from interface: BufWriter

Write an unsigned byte to the buffer

Specified by:

writeU1 in interface BufWriter

Parameters:

x - the byte value

writeU2

public void writeU2(int x)

Description copied from interface: BufWriter

Write an unsigned short to the buffer

Specified by:

writeU2 in interface BufWriter

Parameters:

x - the short value

writeInt

public void writeInt(int x)

Description copied from interface: BufWriter

Write a signed int to the buffer

Specified by:

writeInt in interface BufWriter

Parameters:

x - the int value

writeFloat

public void writeFloat(float x)

Description copied from interface: BufWriter

Write a float value to the buffer

Specified by:

writeFloat in interface BufWriter

Parameters:

x - the float value

writeLong

public void writeLong(long x)

Description copied from interface: BufWriter

Write a long value to the buffer

Specified by:

writeLong in interface BufWriter

Parameters:

x - the long value

writeDouble

public void writeDouble(double x)

Description copied from interface: BufWriter

Write a double value to the buffer

Specified by:

writeDouble in interface BufWriter

Parameters:

x - the int value

writeBytes

public void writeBytes(byte[] arr)

Description copied from interface: BufWriter

Write the contents of a byte array to the buffer

Specified by:

writeBytes in interface BufWriter

Parameters:

arr - the byte array

writeBytes

public void writeBytes(BufWriter other)

Description copied from interface: BufWriter

Write the contents of another BufWriter to the buffer

Specified by:

writeBytes in interface BufWriter

Parameters:

other - the other BufWriter

writeBytes

public void writeBytes(byte[] arr,
 int start,
 int length)

Description copied from interface: BufWriter

Write a range of a byte array to the buffer

Specified by:

writeBytes in interface BufWriter

Parameters:

arr - the byte array

start - the offset within the byte array of the range

length - the length of the range

patchInt

public void patchInt(int offset,
 int size,
 int value)

Description copied from interface: BufWriter

Patch a previously written integer value. Depending on the specified size, the entire value, or the low 1 or 2 bytes, may be written.

Specified by:

patchInt in interface BufWriter

Parameters:

offset - the offset at which to patch

size - the size of the integer value being written, in bytes

value - the integer value

writeIntBytes

public void writeIntBytes(int intSize,
 long intValue)

Description copied from interface: BufWriter

Write a 1, 2, 4, or 8 byte integer value to the buffer. Depending on the specified size, the entire value, or the low 1, 2, or 4 bytes, may be written.

Specified by:

writeIntBytes in interface BufWriter

Parameters:

intSize - the size of the integer value being written, in bytes

intValue - the integer value

reserveSpace

public void reserveSpace(int freeBytes)

Description copied from interface: BufWriter

Ensure that the buffer has at least freeBytes bytes of unused space

Specified by:

reserveSpace in interface BufWriter

Parameters:

freeBytes - the number of bytes to reserve

size

public int size()

Description copied from interface: BufWriter

Returns the number of bytes that have been written to the buffer.

Specified by:

size in interface BufWriter

Returns:

the number of bytes that have been written to the buffer

asByteBuffer

public ByteBuffer asByteBuffer()

Description copied from interface: BufWriter

Returns a ByteBuffer view of the bytes in the buffer.

Specified by:

asByteBuffer in interface BufWriter

Returns:

a ByteBuffer view of the bytes in the buffer

copyTo

public void copyTo(byte[] array,
 int bufferOffset)

Description copied from interface: BufWriter

Copy the contents of the buffer into a byte array.

Specified by:

copyTo in interface BufWriter

Parameters:

array - the byte array

bufferOffset - the offset into the array at which to write the contents of the buffer

writeIndex

public void writeIndex(PoolEntry entry)

Description copied from interface: BufWriter

Write the index of the specified constant pool entry, as a u2, to the buffer

Specified by:

writeIndex in interface BufWriter

Parameters:

entry - the constant pool entry

writeIndexOrZero

public void writeIndexOrZero(PoolEntry entry)

Description copied from interface: BufWriter

Write the index of the specified constant pool entry, as a u2, to the buffer, or zero if the entry is null

Specified by:

writeIndexOrZero in interface BufWriter

Parameters:

entry - the constant pool entry

writeList

public <T extends WritableElement<?>> void writeList(List<T> list)

Description copied from interface: BufWriter

Write a list of entities to the buffer. The length of the list is written as a u2, followed by the bytes corresponding to each element in the list. Writing of the entities is delegated to the entry.

Specified by:

writeList in interface BufWriter

Type Parameters:

T - the type of entity

Parameters:

list - the entities

writeListIndices

public void writeListIndices(List<? extends PoolEntry> list)

Description copied from interface: BufWriter

Write a list of constant pool entry indexes to the buffer. The length of the list is written as a u2, followed by a u2 for each entry in the list.

Specified by:

writeListIndices in interface BufWriter

Parameters:

list - the list of entries